1 definition by Crazed4now

Yaoi is a shortened version of the term "Yama nashi, Ochi nashi, Imi nashi"; which means "No plot, no point, no meaning."

And while this is what it DOES mean, the term is loosely used in the United States to mean something else. The actual term itself SHOULD be the same as a PWP (or porn without plot), but that's not always the case. If you ever talk to a fangirl/boy, many of them will actually mean it as the following:
PWP: Pure sex, nothing else to it.
Yaoi: Plot involved, but 18+ content.
Shonen-ai: Plot and only PG-13 content.

Other terms that should be known for the understanding of the BL genre (or boy's love) are doujinshi (fanfics basically), Shota (pedophilia), and tanbi (which isn't used anymore, but it set the ground for BL).

Oh and to those out there that will find this out the long way, just because Juné SAYS it's a yaoi manga, it doesn't always mean that. The rating on the back will determine if it's a yaoi or not.
person 1: Hey, the book says it's a yaoi, but is it really?
person 2: Depends, do they have sex?
person 1: Yes.
person 2: Do you SEE them having sex?
person 1: No.
Person 2: Then no.
by Crazed4now August 5, 2008
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